Answer:
x = 1
Step-by-step explanation:
The factors of the given expression is as follows:
[tex]7x(x^2-1) -3(x^2-1)\\\\7x^3 - 7x - 3x^2 +3\\\\7x^3 - 3x^2 -7x + 3[/tex]
If we considered x = 1
So
7 - 3 -7 + 3 = 0
0 = 0
Hence, the factor would be x = 1
